FAB FOTOS! "Teen Mom 2" Star With Her Mom!

The volatile relationship between Jenelle Evans and her mother Barbara is central to the new season of "Teen Mom 2" -- but things appear to be patched up ... for now.

Last week's action-packed first episode ended with Barb serving her daughter with custody papers and a expletive-filled tirade between the two -- but Barbara, Jenelle and Jenelle's adorable son Jace, were spotted over the weekend in South Carolina actually smiling and looking happy to be around each other.

FYI -- Filming for the show took place last year, so they've had some time to cool off.